Clamp



FIG. 1 is an open-end elevation view of the clamp;

FIG. 2 is a side elevation view of the clamp; it is understood that the other side elevation view is the same;

FIG. 3 is a closed-end elevation view of the clamp;

FIG. 4 isa top-plan view of the clamp; and,

FIG. 5 is a bottom-plan view of the clamp. 

The ornamental design for a clamp, as shown and described. 